Examples with SyntheticCompositeNode org.eclipse.xtext.nodemodel.impl.SyntheticCompositeNode used on opensource projects

Example 6 with SyntheticCompositeNode

use of org.eclipse.xtext.nodemodel.impl.SyntheticCompositeNode in project n4js by eclipse.

the class AbstractSmokeTester method skipNodesInBetween.

private void skipNodesInBetween(CharSequence input) throws Exception {
    String string = input.toString();
    Script script = completeScript(string);
    if (script != null) {
        XtextResource resource = (XtextResource) script.eResource();
        ICompositeNode rootNode = resource.getParseResult().getRootNode();
        ReplaceRegion region = null;
        for (INode node : rootNode.getAsTreeIterable()) {
            if (node instanceof ICompositeNode && !(node instanceof SyntheticCompositeNode)) {
                ICompositeNode casted = (ICompositeNode) node;
                int offset = node.getTotalOffset();
                int length = node.getTotalLength();
                if (length != 0) {
                    if (casted.getFirstChild().equals(casted.getLastChild())) {
                        if (region == null || region.getOffset() != offset || region.getLength() != length) {
                            region = new ReplaceRegion(offset, length, "");
                            StringBuilder builder = new StringBuilder(rootNode.getText());
                            region.applyTo(builder);
                            processFile(builder.toString());
                        }
                    }
                }
            }
        }
    }
}

Example 7 with SyntheticCompositeNode

use of org.eclipse.xtext.nodemodel.impl.SyntheticCompositeNode in project xtext-core by eclipse.

the class PartialParsingHelper method isInvalidRootNode.

protected boolean isInvalidRootNode(ICompositeNode rootNode, ICompositeNode candidate) {
    int endOffset = candidate.getTotalEndOffset();
    if (candidate instanceof SyntheticCompositeNode)
        return true;
    if (candidate.getGrammarElement() instanceof RuleCall) {
        AbstractRule rule = ((RuleCall) candidate.getGrammarElement()).getRule();
        if (!(rule instanceof ParserRule))
            return true;
        ParserRule casted = (ParserRule) rule;
        if (GrammarUtil.isDatatypeRule(casted) || casted.isFragment() || !casted.getParameters().isEmpty()) {
            return true;
        }
        if (isInvalidDueToPredicates((AbstractElement) candidate.getGrammarElement()))
            return true;
    }
    if (candidate.getGrammarElement() instanceof Action) {
        return true;
    }
    if (endOffset == rootNode.getTotalEndOffset()) {
        INode lastChild = getLastChild(candidate);
        if (lastChild instanceof ICompositeNode) {
            INode lastLeaf = getLastLeaf(candidate);
            if (isInvalidLastChildNode(candidate, lastLeaf)) {
                return true;
            }
        }
        if (isInvalidLastChildNode(candidate, lastChild)) {
            return true;
        }
    }
    return false;
}

Example 8 with SyntheticCompositeNode

use of org.eclipse.xtext.nodemodel.impl.SyntheticCompositeNode in project xtext-core by eclipse.

the class PartialParsingHelper method reparse.

@Override
@SuppressWarnings({ "unchecked", "rawtypes" })
public IParseResult reparse(IParser parser, IParseResult previousParseResult, ReplaceRegion changedRegion) {
    if (parser == null)
        throw new NullPointerException("parser may not be null");
    if (previousParseResult == null) {
        throw new NullPointerException("previousParseResult and previousParseResult.rootNode may not be null");
    }
    ICompositeNode oldRootNode = previousParseResult.getRootNode();
    if (changedRegion.getEndOffset() > oldRootNode.getTotalLength()) {
        log.error("Invalid " + changedRegion + " originalLength=" + oldRootNode.getTotalLength());
        return fullyReparse(parser, previousParseResult, changedRegion);
    }
    if (changedRegion.getOffset() >= oldRootNode.getTotalLength() && changedRegion.getText().trim().length() == 0) {
        return fullyReparse(parser, previousParseResult, changedRegion);
    }
    ReplaceRegion replaceRegion;
    if (tokenRegionProvider != null) {
        replaceRegion = tokenRegionProvider.getTokenReplaceRegion(insertChangeIntoReplaceRegion(oldRootNode, changedRegion), changedRegion);
    } else {
        replaceRegion = changedRegion;
    }
    if (isNullEdit(oldRootNode, replaceRegion)) {
        return previousParseResult;
    }
    PartialParsingPointers parsingPointers = calculatePartialParsingPointers(previousParseResult, replaceRegion.getOffset(), replaceRegion.getLength());
    List<ICompositeNode> validReplaceRootNodes = parsingPointers.getValidReplaceRootNodes();
    ICompositeNode oldCompositeNode = null;
    String reparseRegion = "";
    for (int i = validReplaceRootNodes.size() - 1; i >= 0; --i) {
        oldCompositeNode = validReplaceRootNodes.get(i);
        if (!(oldCompositeNode instanceof SyntheticCompositeNode) && !isRangePartOfExceedingLookAhead((CompositeNode) oldCompositeNode, replaceRegion)) {
            boolean replaceAtEnd = oldCompositeNode.getTotalEndOffset() == replaceRegion.getEndOffset();
            reparseRegion = insertChangeIntoReplaceRegion(oldCompositeNode, replaceRegion);
            if (!"".equals(reparseRegion)) {
                if (!replaceAtEnd || !Character.isWhitespace(reparseRegion.charAt(reparseRegion.length() - 1))) {
                    if (log.isDebugEnabled()) {
                        log.debug("replace region: [" + oldCompositeNode.getTotalOffset() + " / length: " + oldCompositeNode.getTotalLength() + " of [" + oldRootNode.getTotalOffset() + " / lenght: " + oldRootNode.getTotalLength() + "]");
                    }
                    break;
                }
            }
        }
    }
    if (oldCompositeNode == null || reparseRegion.equals("") || oldCompositeNode == oldRootNode) {
        return fullyReparse(parser, previousParseResult, replaceRegion);
    }
    EObject entryRuleOrRuleCall = parsingPointers.findEntryRuleOrRuleCall(oldCompositeNode);
    IParseResult newParseResult = null;
    try {
        if (entryRuleOrRuleCall instanceof RuleCall)
            newParseResult = parser.parse((RuleCall) entryRuleOrRuleCall, new StringReader(reparseRegion), oldCompositeNode.getLookAhead());
        else
            newParseResult = parser.parse((ParserRule) entryRuleOrRuleCall, new StringReader(reparseRegion));
    } catch (ParseException exc) {
    }
    if (newParseResult == null || newParseResult.hasSyntaxErrors()) {
        // on error fully reparse
        return fullyReparse(parser, previousParseResult, replaceRegion);
    }
    if (oldRootNode.equals(oldCompositeNode)) {
        unloadSemanticObject(previousParseResult.getRootASTElement());
        return newParseResult;
    }
    EObject oldSemanticParentElement = oldCompositeNode.getParent().getSemanticElement();
    EObject oldSemanticElement = null;
    if (oldCompositeNode.hasDirectSemanticElement()) {
        oldSemanticElement = oldCompositeNode.getSemanticElement();
    } else {
        List<ICompositeNode> nodesEnclosingRegion = parsingPointers.getNodesEnclosingRegion();
        for (int i = nodesEnclosingRegion.size() - 1; i >= 0; --i) {
            ICompositeNode enclosingNode = nodesEnclosingRegion.get(i);
            if (enclosingNode == oldCompositeNode) {
                break;
            }
            if (enclosingNode.hasDirectSemanticElement())
                oldSemanticElement = enclosingNode.getSemanticElement();
        }
        if (oldSemanticElement == null)
            return fullyReparse(parser, previousParseResult, replaceRegion);
    }
    if (oldSemanticElement == oldSemanticParentElement) {
        throw new IllegalStateException("oldParent == oldElement");
    }
    if (oldSemanticParentElement != null) {
        EStructuralFeature feature = oldSemanticElement.eContainingFeature();
        if (feature == null)
            return fullyReparse(parser, previousParseResult, replaceRegion);
        oldSemanticParentElement = oldSemanticElement.eContainer();
        if (feature.isMany()) {
            List featureValueList = (List) oldSemanticParentElement.eGet(feature);
            int index = featureValueList.indexOf(oldSemanticElement);
            unloadSemanticObject(oldSemanticElement);
            EObject newSemanticObject = newParseResult.getRootASTElement();
            if (newSemanticObject != null) {
                featureValueList.set(index, newParseResult.getRootASTElement());
            } else {
                featureValueList.remove(index);
            }
        } else {
            unloadSemanticObject(oldSemanticElement);
            oldSemanticParentElement.eSet(feature, newParseResult.getRootASTElement());
        }
        ((ParseResult) newParseResult).setRootASTElement(previousParseResult.getRootASTElement());
    } else {
        unloadSemanticObject(oldSemanticElement);
    }
    if (oldCompositeNode != oldRootNode) {
        nodeModelBuilder.replaceAndTransferLookAhead(oldCompositeNode, newParseResult.getRootNode());
        ((ParseResult) newParseResult).setRootNode(oldRootNode);
        StringBuilder builder = new StringBuilder(oldRootNode.getText());
        replaceRegion.applyTo(builder);
        nodeModelBuilder.setCompleteContent(oldRootNode, builder.toString());
    }
    return newParseResult;
}